Cigarette filter



May 17, 1960 s. VAN TuYL.

CIGARETTE FILTER 2 Sheets-Sheet 1 Filed June 6, 1956 INVENTOR S/DNEYl/HA/ T12/YL ATT NEY BY mvv May 17, 1960 s. VAN TuYl. 2,936,764

CIGARETTE FILTER Filed June 6, 1956 2 sheets-*sheet z INVENTOR .S/DA/EYWW 75K/ TTORNEY "A further 'objectof my United States Patenty 2,936,164CIGARErrE FILTERL l Y Sidney Tuyl, Fort Pierce, Fla. `Application June619`56, serial N6'. 589,604r

s claims. (cl. 131-208) My invention relates 'to an improved cigarettelter vand lto a method of making the same and more particularly to acigarette lter which provides ltering action while permitting smoke tobe drawn through the lter with ease, and to aV method for making thefilter.

Many attempts have been vmade inthe prior art to provide a cigarettelterwhich effectively lters cigarette lsmoke toremove la substantial amountof the tobacco tars and nicotine from smoke being inhaled. These .ltersofthe prior art are formed of wads of fibrous material or from rolls ofpaper and other like materials. Where the filters of the prior art aresufiici'ently dense to give effective ltering action, they do not permitsmoke .to be drawn easily through'the lter. For this reason,

cigarettes provided with dense lters dor not give a satisfactory smoke.Where the lters of the prior art are lter which gives effective lteringaction while permitting smoke to be drawn through the lter with relativeease. f v

Another-.object of invention is to provide a cigarette filter whichgives'eiective filtering action while being inexpensive to manufacture.y Y Y ,Y

vention is to provide a method of making my cigarette lter.

Other and further objects of my invention will appear from the followingdescription.

In general my invention contemplates the provision of av cigarette lterincluding a pair of paper strips formed with sharp creases extending ina direction at an angle to the strip axes. Owing to the nature of thepaper I employ, the sharpcreases break and displace bers along thecrease edges, thus causing them to extend into the passages formed bythe paper rolled upon itself. I place the strips of a pair one on theother with the creases of the respective strips relatively angularlydisposed. The lter is formed by rolling the superposed strips to form acylinder having a plurality of generally axially extending tortuoussmoke passages into which the upstanding bers extend. Smoke being drawnthrough the passages is ltered by the bers upstanding from` the creasesto collect a large percentage of tobacco tars and nicotine contained inthe cigarette smoke. In the accompanying drawings which formpart of2,936,764 laltented May 1'?, 969

ice

junction therewith and in which like reference numerals y mylter. f

vFigure 2 is a plan View of one strip of a pair of paper Vstrips ofwhich my ltery is formed.

Figure 3 is a plan view of the other strip of a pair Yof strips of whichmy lter is formed.

. Figure 4 is a plan view of a pair of superposed strips of which myfilter vis formed.

Figure 5 is av sectional view of the strip shown in Figure 2 taken alongthe line 5-5 and drawn on an enlarged scale.

Figure 6 is a perspective view of my lter.

Figure` 7 is a fragmentary perspective view of a pair of'fltery formingstrips in superposed relationship showing'the path of smoke through Vmylter.

,. `Figure 8 is a schematic view of one-form of apparatus on ,which mylter may be constructed.

` More. particularly referring now to Figures 1 to 7 of the drawings, mylter, indicated generally by the reference character 10, may beassembled in a cigarette 12 f, `infan'y convenient manner known to theart. For ex- .constructed to permit easy drawing, the ltering action`ample, the lter may be encased in the paper jacket 14 of the cigarette.As can be seen by reference to Figure 2, my lter includes a first paperstrip 16 formed with a plurality of sharp creases 18. These creases 18extend atan angle A to the minor axis of the strip 16 which may betakenalong'the line x-x in Figure 2. As can vbeseen by reference to Figure 3,my lter includes a second paper strip 20 formed with a plurality ofsharp creases 22 making an angle B with the minor axis of Y the paper'strip 20, -which may be taken along the line y--y of Figure 3. I formstrips 16 and 20 from a paper having a nature such that bers Y24 of thepaper are broken or displaced so as to stand out from the edges of thecreases 1S and 22. The paper of which ystrips 16 and 20 are formed isany paper which releases pulp or lint bers from its bond when the paperis sharply creased. As will be explained hereinafter, the fibers 24perform the actual ltering action of my filter. v @Referring now toFigures 4 and 7, in the next step lof forming my'iilter. I superpose thestrip 16 on the strip 20 with thevcreases 18 relatively angularlydisposed with respect to theV creases 22. While the angles A and Bmaybeany convenient angles, preferably I make these angles 45. With thestrips 16 and 20.superposed, a

"plurality of diamond-shaped traps or' pockets, indicated generally bythe reference character 26, are formed.y

When cigarette smoke is drawn through my lter in the direction of theaxes x-x and y-y of the strips, smoke passes through a succession oftraps 26 along tortuous paths, one of which is indicated kby the arrowsin Figure 7. A great number of bers 24 extend into each of the traps orpockets 26 inthe path of smoke traveling through a pocket.

The smokeis effectively ltered by these bers 24 as it travels fromone'pocket 26 to a succeeding the instant specification and which are toVbe read in oon-L A pocket. Inthe course ofthe passage of smoke betweenthe paper strips 16 and 20 as shown in Figure 7, the fibers 24 adsorband absorb .a substantial amount of the tobacco tars and nicotine in thesmoke. ciated that the paths provided by a succession of traps 26 permitsmoke to be drawn through the lter with relative ease. At the same time,bers 2'4 effectively filter the smoke.

In the nal steps of making my filters, I cut the superposed strips 16and 20 to the proper length and roll up Vthe cut, superposed strips toform the filter. In its nal conguration, the filter appears as is shownin Figure 6.

Referring now to Figure 8, I have shown one form It will be appre- Y ofapparatus on which my lters-may be made. The strips 28 and 30 of a pairof lter-forming strips, of the type paper described hereinabove, passthrough the vnips .of respective pairs of lluted rollers' v32 .and .34and 36 and 3S. Rollers 32 and 34 have v'fluted surfaces which mesh Ytocrease Ystrip ,28 to' provide it with creases, Isuch as the creases 1S,which make an angle A with a transverse axis of the strip. .The pair ofrollers `36 `and 38 are fluted and mesh to provide. strip 30 withcreases similar to the creases 22, whichy make an angle Buwith atransverse axis of strip 30. Any convenient drive means .known to theartmay be employed to drive the uted rollers in the directions of .thearrowsin Figure 8.

After emerging from the pairskof rollers .32, 34, 36 .and 38, 4thecreased strips 23 .and 30 are fed to a pair of rollers 4? and 42 whichbring the strips 'together in superposed relationship `on a table 44. Asthe superposed strips advance across table 44, .a knife 46, reciprocatedin .a housing 48 by any convenient means, such as .a

the art to form lters which may :be assembled in cigarettes.

In use or" my filter .10 it is assembled with a cigarette 12 with thestrip axes x--x and y-yY extending in the :direction of the cigaretteaxis. Smoke being drawn from the cigarette through the lter travelsalong the tortuous paths, one of which is indicated in Figure 7, throughsuccessive traps or pockets 26. As the smoke travels from pocket topocket, bers 24 upstanding from the edges .of creases IS and 22 collecta relatively large percentage .of the .tobacco tars and nicotine presentin the smoke. While providing this effective filtering action, my filterpermits the smoke to pass readily through the lter.y

In orderto make my filter, I rst form a pair of strips of paper withsharp creases extending in a direction at an angle to the strip axes.After having creased the strips, I assemble them in superposedrelationship with their creases relatively angularly disposed. I cut thevstrips to length and roll them to form finished filters which may beassembled into cigarettes.

While I have shown and described my lter as including yonly two strips16 and 20 of paper, it is to be under- It will be seen that I haveaccomplished the objects of my invention. l vhave provided a cigarette-lter which provides effective ltering action while permitting smoke toIbe drawn through the filter with relative ease. I have provided amethod for making my filter. My lter is A relatively inexpensive tomanufacture.

l. A lter for ycigarettes including in combination a' rst strip ofpaper` formed with sharp creases providing channels extending vin adirection at an acute angle to Vthe transverse axis of the strip andridges separating Vsaid channels and a second'str'ip -of paper formedwith sharp creases providing channels extending in a direction at anacute angle to the vtransverse axis ofthe Asecond strip and ridgesseparating said channels, said strips being superposed with ridges ofone strip contacting ridges of the other strip and with the channels ofthe respective strips extending in diverging directions to form aplurality of connected vfilter pockets providing vlabyrinth paths forsmoke drawn through fthe `filter, the channels of each -of said stripsextending in a direction making an `acute angle with the longitudinalaxis of `the ilter. Y

2. A filter as in claim 1 in which said creases provide edges andincluding a plurality of fibers extending outwardly from said creaseedges.

3. A yfilter as in claim l in which said paper Areadily releases fibersfrom the paperY bond when creased.

4. A iilter asin claim 1 in which said rst strip creases and said secondstrip creases extend at rangles of with respect to the strip axis.

5. A filter as in claim 1 in which the creases of the respective stripsare disposed at right angles with respect to each other. n

l References Cited Iin the le of this patent UNITED STATES PATENTS o2,325,386 Frank July 27, 1943 FOREIGN .PATENTS 177,423 Austria Jan. 25,1954 437,599 Great vBritain Oct. 28, ,1935 574,422 Germany r Apr. 12,1,933 745,245 Great Britain4 Feb. 22, 1956

